Uncle Ben deposited a certain amount of money in a savings account in a bank (which pays 0.5% interest) so that in the next twelve months you can have enough money to cover your tuition and expenses. The estimated amount you need is $1,200 for the first 4 months to pay your tuition and expenses. From there you expect that your monthly expenses will decrease by $100 each month. In month 12, you will need an additional $500 over the monthly expenses to visit your uncle. Draw the cash flow diagram and identify all the variables.